Table saw

ABSTRACT

A table saw has a base assembly, a table assembly supported by the base assembly, the table assembly, and a saw assembly supported by at least one of the table assembly and the base assembly. The saw assembly has a saw blade extending through the table assembly. The base assembly has at least one foot having a substantially horizontal surface, a substantially vertical surface, and a curved surface disposed between the substantially horizontal surface and the substantially vertical surface. The substantially vertical surface is substantially coplanar with a surface of the table assembly so that the table saw can be disposed on the substantially vertical surface and the surface of the table assembly.

CROSS-REFERENCE TO RELATED APPLICATION

This application derives priority from U.S. Patent Application No.61/865,763, filed on Aug. 14, 2013, which is hereby incorporated inwhole by reference.

FIELD

This invention relates generally to a table saw and more specifically toconstruction techniques for manufacturing table saws.

BACKGROUND

Typical portable table saws have a table, a base supporting the table, asaw assembly attached to the table and/or the base. The base istypically made of metal or plastic. Bases made of metal are typicallyheavy and relatively flexible, as they consist mostly of metal paneling.Bases made of plastic on the other hand could break when the table sawis dropped.

SUMMARY

In accordance with the present invention, an improved table saw isemployed. The table saw has a base assembly, a table assembly supportedby the base assembly, a saw assembly supported by at least one of thetable assembly and the base assembly, the saw assembly including a sawblade extending through the table assembly, wherein the base assemblycomprises at least one foot having a substantially horizontal surface, asubstantially vertical surface, and a curved surface disposed betweenthe substantially horizontal surface and the substantially verticalsurface, wherein the substantially vertical surface is substantiallycoplanar with a surface of the table assembly so that the table saw canbe disposed on the substantially vertical surface and the surface of thetable assembly.

Additional features and benefits of the present invention are described,and will be apparent from, the accompanying drawings and the detaileddescription below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate preferred embodiments of theinvention according to the practical application of the principlesthereof, and in which:

FIG. 1 illustrates a table saw according to the invention;

FIG. 2 is an inside view of a foot assembly;

FIG. 3 illustrates the table saw being carried by a user;

FIG. 4 is a partial view of a fence assembly;

FIG. 5 is an exploded view of components in the fence assembly of FIG.4;

FIG. 6 illustrates the installation and positioning of the fenceassembly of FIG. 4, where FIG. 6A shows how the fence assembly isinstalled unto the table saw, and FIGS. 6B-6C shows the fence assemblyin a first position and a second position respectively;

FIG. 7 is a cross-sectional view along line VII-VII of FIG. 6C;

FIG. 8 is illustrates the positioning of a support member of the fenceassembly, where FIG. 8A is a side view of the support member in a firstposition, and FIG. 8B is a perspective view of the support member in asecond position and a third position shown in solid and broken lines,respectively.

DETAILED DESCRIPTION

The invention is now described with reference to the accompanyingfigures, wherein like numerals designate like parts. Referring to FIG.1, a table saw 100 may include a base assembly 10, a table assembly 11supported by base assembly 10, and a saw assembly (not shown) supportedby the table assembly 11. Persons skilled in the art will recognize thatthe construction of the saw assembly is well known and can be found inU.S. Pat. Nos. 5,875,698, 6,009,782, 6,450,077 and 6,907,807, all ofwhich are hereby incorporated by reference.

The saw assembly may include a blade 31, extending through tableassembly 11. A blade guard 31G may surround a portion of blade 31.

Base assembly 10 may include at least one tube 21 attached to tableassembly 11. Tube 21 may be made of a composite material, such as carbonfiber or fiber glass, extruded metal, such as aluminum, steel tubing ormolded plastic. Persons skilled in the art will recognize plastic tubingmay be molded via gas-assist, injection molded, etc. Persons skilled inthe art are referred to US Patent Publication No. 2007/0245869, which ishereby incorporated by reference for further details on sucharrangement.

Preferably, base assembly 10 has two substantially U-shaped tubes 21connected to table assembly 11. Each U-shaped tube 21 preferably has twosubstantially vertical tubes 21V and a substantially horizontal tube21H. Tubes 21V, 21H may be welded to each other or formed integrally.Tubes 21 may be bolted directly unto table assembly 11 as disclosed inUS Patent Publication No. 2007/0245869.

A carrying handle 21C may be attached to tubes 21V or table assembly 11.Preferably carrying handle 21C is a tube welded to tubes 21V and havinga grip portion, preferably made of rubber.

Tubes 21 may have adjustable feet assemblies 23. Referring to FIGS. 1-2,foot assembly 23 is preferably made of plastic with overmolded rubber,or another high friction material. Preferably, foot assembly 23 is madeof two halves sandwiching tubes 21V, 21H. Bolts 23BB may extend bosses23B in both halves of foot assembly 23, and through tubes 21V, 21H tofix tubes 21V, 21H to foot assembly 23.

Each foot assembly 23 preferably has a substantially horizontal bottomsurface 23H, a substantially vertical outer surface 23V and a curvedsurface 23C disposed between surfaces 23H, 23V. Persons skilled in theart will recognize that curved surface 23C is preferably connected tosurfaces 23H, 23V. Bottom surfaces 23H preferably define a substantiallyhorizontal plane HP. It is desirable that the center of gravity CG isdisposed between the foot assemblies 23.

Table assembly 11 has a horizontal surface 11H for supporting aworkpiece (not shown) and an outer surface 11S adjacent to horizontalsurface 11H. Persons skilled in the art will recognize that outersurface 11S is the outermost sideward surface on table assembly 11 andthat nothing in table assembly 11 will extend beyond outer surface 11S.Preferably outer surface 11S and vertical surface 23V define asubstantially vertical plane VP, which may be substantiallyperpendicular to horizontal plane HP.

Center of gravity CG is preferably disposed between feet assemblies 23and table assembly 11 and/or outer surface 11S. This would allow a userto stably dispose table saw 100 on its side, so that outer surface 11Sand table assembly 11 and/or feet assemblies 23 are resting on the flooror other substantially horizontal surface. Preferably, the center ofgravity CG is disposed between feet assemblies 23 and handle 21C so thatwhen a user is holding table saw 100 by handle 21C with the tableassembly 11 facing the user (as shown in FIG. 3), the center of gravityCG causes table saw 100 to move towards the user along the direction ofarrow B.

Persons skilled in the art will recognize that feet assemblies 23 willprovide better impact protection against drops if table saw 100 isdropped. Persons skilled in the art may also recognize that having feetassemblies 23 with curved surfaces 23C could allow a user to rotatetable saw 100 from a horizontal position (as shown on the left side ofFIG. 1) to a vertical position (as shown on the right side of FIG. 1).The user for example could grab handle 21C or table assembly 11 on theleft side and lift table saw 100 while maintaining feet assemblies 23 atthe right end of table saw 100 on the floor or support surface. Thetable saw 100 would then end up in the vertical position of FIG. 1, withan exposed handle 21C.

Referring to FIG. 1, front panel 22 may be disposed on tube(s) 21. Frontpanel 22 may be made of metal or plastic. Front panel 22 may support anon/off switch 32, a height adjustment crank 33 and a bevel lock crank34.

Referring to FIGS. 1 and 4-8, table saw 100 preferably has a front railassembly 50 attached to a front side of table assembly 11, a rear railassembly 50 attached to a rear side of table assembly 11, the railassemblies 50 supporting a fence assembly 60. Persons skilled in the artare referred to U.S. Pat. Nos. 5,722,308 and 6,450,077, which are fullyincorporated by reference, for information on the construction of railassembly 50 and fence assembly 60.

Each rail assembly 50 preferably includes a fixed rail assembly 51bolted unto table assembly 11 via a bolt 51B. Rail assembly 51 mayinclude a fixed rail 51R, which is preferably made of extruded aluminum.Fixed rail 51R may have an overmolded portion 51O.

A sliding rail 52 may be slidingly disposed on each fixed rail assembly51. Sliding rail 52 is preferably made of extruded aluminum. Slidingrail 52 preferably has a slot 52S and a channel 52C disposed adjacent tothe slot 52S. Each sliding rail 52 may have a rack 53.

A boss 54 may extend through slot 52S and threadingly engage a nut 54Ndisposed in channel 52C. This allows a user to move boss 54 along slot52S. As will be further discussed below fence assembly 60 has a fencebeam 62 with a fence plane FP against which a user would place aworkpiece, and a mount 61 supporting the fence beam 62. Mount 61 isdisposed on boss 54. By adjusting the position of boss 54 relative toslot 52S, the user can thus adjust the position of the fence assembly 60relative to the sliding rail 52 and/or adjust the parallelism of fenceassembly 60 relative to blade 31.

Referring to FIGS. 1 and 4-8, mount 61 preferably has a body 61B that isdisposed on sliding rail 52, a post 61P connected to body 61B, and afence support 61F connected to the post 61P for supporting a fence beam62. Preferably body 61B has a horizontal surface 61BS that contacts theupper surface of sliding rail 52, and a slot 61S for receiving boss 54.

Preferably body 61B carries a lock 61L rotatably attached to body 61B.Lock 61L preferably has a cam surface 61LC extending radially from theaxis of rotation of lock 61L. One possible means for attachment is toprovide body 61B with ears 61IE. Lock 61L can then be disposed betweenears 61IE. A pin 61LP can then extend through ears 61IE and lock 61L tomaintain the rotational connection between lock 61L and ears 61IE.

Preferably body 61B is made of plastic and carries an insert 61I made ofmetal, such as steel. Having such insert strengthens body 61B whilereducing overall weight. Insert 61I may have slot 61S and/or ears 61IE.

With such construction, the user can move fence assembly 60 so that slot61S can receive boss 54 (see FIG. 6A). Once boss 54 is in slot 61S, theuser can rotate fence assembly 60 so that mount 61 (and horizontalsurface 61BS) is on sliding rail 52. The user can then rotate lock 61Lso that cam surface 61LC extends into slot 52S and contacts a wall ofsliding rail 52, preferably a wall defining slot 52S. As the cam surface61LC is rotated, further pressure is placed on such wall, locking themount 61 unto sliding rail 52.

Referring to FIGS. 1 and 6, it is preferable that two bosses 54 aredisposed on sliding rail 52 rightwardly of blade 31. This allows theuser to place fence assembly 60 in two positions without having to movebosses 54 and sliding rail 52 relative to fixed rail assembly 51. FIGS.6B-6C illustrate the first and second positions, respectively. In thefirst position, mount 61 is connected to the boss 54 closest to blade31. In such position, fence plane FP is within the ends of fixed railassembly 51, sliding rail 52 and/or table 11.

In the second position, mount 61 is connected to the boss 54 farthestfrom blade 31. In such position, fence plane FP is preferably outside ofthe ends of fixed rail assembly 51, sliding rail 52 and/or table 11.Persons skilled in the art will recognize that this second position isachievable because mount 61 is effectively cantilevered by theconnection to boss 54 and horizontal surface 61BS.

Persons skilled in the art shall recognize that it is possible toprovide a similar multi-position fence by providing the mount 61 withtwo slots 61S that can be receive a single boss 54. With sucharrangement, the user can take mount 61 off boss 54 so that boss 54cannot engage the first slot 61S and move mount 61 so that the secondslot 61S engages boss 54.

Referring to FIGS. 1, 4 and 8, fence assembly 60 may include a supportmember 65 rotatably mounted to fence support 61F. Support member 65 mayinclude an arm 65A pivotally connected to fence support 61F and asupport plate 65P for supporting a workpiece W. Arm 65A preferably has aslot 65AS. Fence support 61F has a retaining fastener 61FR extendingthrough slot 65AS, capturing arm 65A.

Such arrangement allows arm 65A (and thus support plate 65P) can bemoved along slot 65AS to be moved between several positions. In a firstposition, support plate 65P can support a workpiece W when the fenceassembly 60 is moved beyond table assembly 11 (as shown in FIG. 8A).Persons skilled in the art will recognize that support plate 65P ispreferably substantially coplanar with surface 11H of table assembly 11.Alternatively, arm 65A (and thus support plate 65P) can be movedupwardly. This allows support plate 65P to be placed on table assembly11, as shown in FIG. 8B.

Preferably fence support 61F have slots 61FS that can receive a pin 65APextending from arm 65A towards fence support 61F. Such pin/slotcombination will allow the user to easily find the different positionsof arm 65A (and thus support plate 65P).

Persons skilled in the art will recognize that arm 65A can be rotatedabout retaining fastener 61FR to a third position (shown in solid linesin FIG. 1 and broken lines in FIG. 8B) where support plate 65SP isbehind fence plane FP, and thus does not interfere with a cuttingoperation. Preferably fence support 61F will have a storage slot 61FSSthat receives pin 65AP when arm 65A is rotated towards the thirdposition. A spring 61FPS may be disposed within storage slot 61FSS forcapturing and retaining pin 65AP (and thus arm 65A).

Persons skilled in the art may recognize other additions or alternativesto the means disclosed herein. However, all these additions and/oralterations are considered to be equivalents of the present invention.

We claim:
 1. A table saw comprising: a base assembly; a table assemblysupported by the base assembly, the table assembly defining a workpiecesupport plane; a saw assembly supported by at least one of the tableassembly and the base assembly, the saw assembly including a saw bladeextending through the table assembly, the saw blade being disposedwithin a saw blade plane; and a fence assembly disposed on the tableassembly, the fence assembly comprising a fixed rail connected to thetable assembly, a sliding rail slidingly connected to the fixed rail,and a fence attached to the sliding rail, the sliding rail sliding alongan axis perpendicular to the saw blade plane, wherein the fencecomprises a fence mount disposable on the sliding rail, a fence beamconnected to the fence mount, the fence beam having a vertical surfacefor engaging a workpiece and a lock mechanism disposed on the fencemount for locking the fence mount on the sliding rail, wherein thevertical surface is parallel to the saw blade plane, wherein the fencecan be lockable on the sliding rail by the lock mechanism in a firstposition where the vertical surface of the fence beam is between firstand second ends of the sliding rail, and in a second position where thevertical surface of the fence beam is a vertical position and notbetween the first and second ends of the sliding rail, where the fenceis lockable on the sliding rail by the lock mechanism in both the firstand second positions.
 2. The table saw of claim 1, wherein the lockmechanism comprises a cam surface that engages a slot in the slidingrail.
 3. The table saw of claim 1, wherein the fence further comprises amovable support plate mounted to the fence mount, the support platebeing movable between a first position where the support plate isbetween the saw blade and the fence beam and where the support plate iscoplanar with the workpiece support plane, and a second position wherethe support plate is not between the saw blade and the fence beam. 4.The table saw of claim 3, wherein the support plate is movable to athird position where the support plate is between the saw blade and thefence beam and where the support plate is disposed above the workpiecesupport plane.